This disclosure provides methods of making a megakaryocyte-erythroid progenitor cell (MEP), comprising differentiating a stem cell into a MEP in culture in the presence of an aryl hydrocarbon receptor (AhR) agonist. In some embodiments the stem cell is a pluripotent stem cell. In some embodiments the MEP co-expresses CD41 and CD235. In some embodiments the number of MEPs produced in the culture increases exponentially. Methods of making a red blood cell (RBC) by culturing a MEP in the presence of an AhR agonist are also provided. Methods of making a megakaryocyte and/or a platelet, comprising culturing a MEP in the presence of an AhR modulator are also provided. In some embodiments the AhR modulator is an AhR antagonist. This disclosure also provides compositions comprising at least 1 million MEPs per ml and compositions in which at least 50% of the cells are MEPs.
本公开提供了一种制备巨核细胞-红细胞祖细胞(MEP)的方法,包括在培养中将干细胞分化为MEP,并在存在
芳香烃受体(AhR)激动剂的情况下进行。在某些实施例中,干细胞是多能干细胞。在某些实施例中,MEP共同表达C
D41和CD235。在某些实施例中,培养中产生的MEP数量呈指数增长。本公开还提供了通过在存在AhR激动剂的情况下培养MEP来制备红细胞(RBC)的方法。还提供了通过在存在AhR调节剂的情况下培养MEP来制备巨核细胞和/或血小板的方法。在某些实施例中,AhR调节剂是AhR拮抗剂。本公开还提供了每毫升至少含有100万个MEP的组合物,以及至少50%的细胞为MEP的组合物。